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Numerical Simulation of a Flapping Wing in Ansys-Fluent Based on the Fruit Fly Wing Kinematics

机译:基于果蝇翼运动学的Ansys-Fluent扑翼的数值模拟

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This document describes the aerodynamic analysis of fruit fly 'Drosophila Melanogaster' flapping wings for a hovering configuration and symmetric movement of trajectories including phase difference. Computational Fluid Dynamics CFD is applied to understand the kinematics behavior and the flapping phenomenon. The simulation was performed in 2D employing the ANSYS® FLUENT, Academic Research software, replicating, in standard conditions, an elliptical geometry of 3% thickness in an O-type computational grid; a laminar, incompressible and unstable fluid was used, with a Reynolds number of 151, evaluating cases with angles of attack of 25°, 35° and 45°. Once results were obtained, the physical effects present in this type of flight such as the Kramer and Wagner effects, Karman and Leading Edge vortices, and wake capture, were identified using detailed vortex contours throughout the flight cycles studied, giving insight of lift and drag coefficients tendency as well as the increase in vortex generation as the angle of attack is augmented, followed by an analysis and comparison with experimental and simulation data obtained from previous researches in order to validate the methodology applied in this study.
机译:该文件描述了果蝇“果蝇”拍打翅膀的空气动力学分析,其悬停构型和包括相差在内的轨迹的对称运动。计算流体动力学CFD用于了解运动学行为和拍动现象。仿真是使用ANSYS®FLUENT,Academic Research软件在2D中进行的,在标准条件下,将O型计算网格中3%厚度的椭圆几何体复制;使用层状,不可压缩且不稳定的流体,雷诺数为151,评估了25°,35°和45°迎角的情况。一旦获得结果,就可以在研究的整个飞行周期中使用详细的涡旋轮廓来识别这种类型的飞行中存在的物理效应,例如Kramer和Wagner效应,Karman和Leading Edge涡旋以及尾迹捕捉,随着攻角的增加,系数趋势趋于增加,涡旋的产生也随之增加,随后与先前研究获得的实验和模拟数据进行分析和比较,以验证在本研究中应用的方法。

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